TapTechNews on May 17th, Microsoft released the Windows 11 Insider Preview Build 26217 to the Canary channel a few days ago, but only fixed some bugs.
Just now, Microsoft updated its official blog again and announced that it provided a 'brand new' visual effect for the 'Rename Your Computer' and 'Change Date and Time' dialog boxes to match the Windows 11 features.
For reference, TapTechNews provides the current version of the 'Rename Your Computer' and 'Change Date and Time' dialog box styles here for comparison.